1 #ifndef _LINUX_PKEYS_H 2 #define _LINUX_PKEYS_H 3 4 #include <linux/mm_types.h> 5 #include <asm/mmu_context.h> 6 7 #ifdef CONFIG_ARCH_HAS_PKEYS 8 #include <asm/pkeys.h> 9 #else /* ! CONFIG_ARCH_HAS_PKEYS */ 10 #define arch_max_pkey() (1) 11 #define execute_only_pkey(mm) (0) 12 #define arch_override_mprotect_pkey(vma, prot, pkey) (0) 13 #define PKEY_DEDICATED_EXECUTE_ONLY 0 14 #define ARCH_VM_PKEY_FLAGS 0 15 16 static inline bool mm_pkey_is_allocated(struct mm_struct *mm, int pkey) 17 { 18 return (pkey == 0); 19 } 20 21 static inline int mm_pkey_alloc(struct mm_struct *mm) 22 { 23 return -1; 24 } 25 26 static inline int mm_pkey_free(struct mm_struct *mm, int pkey) 27 { 28 return -EINVAL; 29 } 30 31 static inline int arch_set_user_pkey_access(struct task_struct *tsk, int pkey, 32 unsigned long init_val) 33 { 34 return 0; 35 } 36 37 static inline void copy_init_pkru_to_fpregs(void) 38 { 39 } 40 41 #endif /* ! CONFIG_ARCH_HAS_PKEYS */ 42 43 #endif /* _LINUX_PKEYS_H */ 44